Sandpapering-machine.



A. H. MATTESON. SANDPAPER'ING MACHINE. APPLICATION FILED FEB. 9, |915. 1,159,696, Patented Nov. 9, 1915.

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A. H. MATTESONI SANDFAPERING MACHINE.

APPLICATION FILED FEB. 9. 1sI5.

Patented Nov. 9, 1915.

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sANoPAPEmNG MACHINE. APPLICATIQN FILED EEB. 9. i915. 1,159,696. Patented Nov. 9, 1915.

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www y :i 531mm fluor/mut A. H. MATTESON.

SANDPAPERING MACHINE. APPLICATION FILED FEB. 9. i915.

Patented Nov. 9, 1915.

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is PATENT "OFFICE,

.ALTON H. MATTESON, OF LMBRIDGE SIIIRINGS, PENNSYLVANIA.

sANDPAPhmNG-MACHINE.

Application filed February 9, 1915. Serial No. 7,023.

To all whom it may concern Be it known that I, ALTON H. MATTE- soN, acitizen of the United States, residing at Cambridge Springs, in the county of Crawford-- and State of Pennsylvania, have invented -certain new and useful Improvements in Sandpapering-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such aswill. enable others skilled in the art to which. it appertains to make and.

use the same.

This invention relates to machines for sandpapering or polishing chair legs or other similar articles; and it consists inthe novel construction and combination of the parts hereinafter fully described and claimed, whereby the work is fed automati' cally to the machine, is smoothed and polished in its passage through the machine, and is finally discharged therefrom.

In the drawings, Figure 1 is an end view of a sandpapering machine constructed according to this invention, the feeding and the centering devices for the work, and some other parts, being omitted for clearness. Fig. 2 is a front view of the machine, par# tially in section, with the feeding devices and various other parts omitted for clearness. Fig. 3 is an end view of one work carrier andv the trip mechanism for op. erating the feeder.

Fig. 4 is an end view of the feeder, and it also showsa portion of the supporting devicesfor the sandpaper, in section. Fig. 5 is a front view of the feeding devices. Fig. 6 is a cross-section through the vfeed magazine or hoppergjtaken on the line in Fig. 4. Fig. 7 is a detail plan view of the adjustable guide for the feeder fingers.' Fig. 8 is a side view of the saine. Fig. 9A is a detail view of a portion of theffeed'er mechanism, showing the feeder fingers in a different position from that position.A A worm-wheel l2 is secured onthe main shaft 5, and 14 isA a `worm secured on a countershaft l5, which is journaled in bearings on Athe frame 2. The worm gears into the Worm-wheel, and the countershaft 1s revolved by a quarter-twist belt 16 which passes over a pulley 17 on the' driving shaft 3 and over a pulley 18 on the counter'shaft.

Specification of Letters Patent. l Patented NOV; 9, 1915.

Any other approved driving devices may be used in carrying out this invention.

Two work carriers 20 and 21 are mounted to revolve with the main shaft 5. The

carrier 20 is keyed fast to the shaft, and

the carrier 21 is splined tol it so that the distance between the carriers may be adjusted to suit work of dierent'llengths. |The carrier 20 has aseries of live spindles 22 journaled in it,4 and arranged in a circle at i equal. distances apart around its center, and

these spindlesfhav'e belt. pulleys 23 secured v onth'em. The spindles 22 have projections 24 at one end for engaging with and revolving the work. Thecarrier 21 has a series of dead spindles 25 mounted in it to correspond with the live spindles 22.' The spindles 25 yare retractable, and they do not revolve in bearings, but have ycenters 26 for the work to revolve on.

The spindles 22 and the work are revolved by means of a belt 27 which passes overthe pulleys 23 and over a belt pulley 28 secured on the drivlng shaft 3. A guide pulley. 29 is supported by and journaled in a bracket 30 at the front part of the machine, and4 it operates to hold fthe beltf27 clear of 'the'A pulleys 23 until the spindles pertaining to them have received the work. A belt-tight-- ener 31 of any lapproved constructionl is arl, ranged under the carrier 20 and holdsthe y belt 27 `at a'predeterminedtension.'

The carrier 20 is revolved-4 belt 27 is moved in the directionfof the lstraight arrow in Fig. 1, to revolvethe spindles.` uThe spindles and the worknare. revolved on their own axes atvthe upper and rear parts'of' the carrier, and are stationaryl while passing through the space betweenlv the belt-tightener 31 and the guide pulley 29, so as 'toafi'ord a good facility for discharging the polished werkend for taking new work.' rlhe worksfis centered and discharged to much better. advantage when the spindles do not revolve. WhenA polished work is discharged from between rapidly revolving spindles it is' thrown out violently and is frequently bruished and dented.

The Work to be sandpapered or polished,

they direc-f` tion of the curved arrow in Fig. 1, and the' and rearwardly inclined arms 39 whicha form a portion of the magazine and support it so that the articles placed in it can slide downwardly by gravity. The articles are fed to the centering devices of the machine, hereinafter described, one by one, by means of two pairs of feeder fingers 46 and 4l. These fingers are pivoted to the opposite ends ofthe lever 42 secured on a rock-shaft 43 which is journaled in the brackets 37. The fingers ofI each pair are projected and retracted alternately by means of a trip arm 44 secured on one end portion of the rock-shaft 43. Pins 45 project from the carrier 2 0-and engage with the trip arm 44.

In Figs. 3 and 4 the full lines show the position of the parts after an article has been discharged from the feeder into the machine. When the tripl arm is moved by one of the pins 45 to the position shown in dotted lines in Fig. 3, the feeder fingers are moved to the position shown in Fig. 9. The magazine is provided with adjustable guides 46, which retain'the articles on itsv surface and permit them to slide down it. These'guides are adjustable so that they will engage with articles of dierent size. In order to adapt the fingers to articles of different widths, their upper end portions are made to slide 'in guide holes 47 and 48. The hole 47 is formed in a plate 49 secured to a bar 50 which is supported by the magazine arallel to the rock-shaft 43. The plate 49 as a slot 51, and the hole 48 is formed in a separate plate 52 which is secured to the plate 49 by a bolt 53 which engages with the slot 5l. The two plates 49 are slidable on the bar 50 and have set-screws 54 for se? curing them after Atheir positions have been adjusted. The4 plates 52 are adjusted on the plates 49 to Varythe distance between the guide holes 47 and 48. i

The articles discharged from .the feeder slide one by one into the notched upper ends 56 of two stationary centering supports. 57. These supports 57 are formed of flat bars which are secured against one side of the upper end portions of arms 58 by bolts 59, and the arms58havevertical slots so that the centering notches can be adjusted vertically and pivotally. The lower end portions of the arms 58are secured to the frame by bolts 60 which Work in the slot 36 so that the arms can be adjusted to suit articles of dierent length. The two arms are also connected together by means of a coupling-bar 62 having a longitud Lral slot 63 and bolt 64 which engage with the arms and work in the said slot. When the centering arms have been adjusted to a preferred distance apart they are coupled by clamping them to the bar 62. Both arms can then be adjusted to different positions on the frame Without changing the distance between them; These adjustments are beneficial because many articles are circular in parts and rectangular in other parts, and it is desirable to adjust the centering notches so that they will engage with the circular or cylindrical Darts of the work.

The dead spindles 25 of the carrier 2l are slidable in it, and are pressed toward the carrier 20 by springs 65. have small rollers 66 and 67 journaled on pins 68 which project laterally from their end portions. The rollers 66 work in slots 69 in the carrier and prevent the spindles from revolving, and the rollers 67 project into the path of a stationary cam plate 70 having an inclined surface 71. This cam plate is secured to the fra-mey 2, and as the tw carriers are revolved with the work held between their spindles, the rollers 67 are retracted by the inclined portion of the cam plate at proper moments for releasing the work, that is to say after the work has ceased to be revolved by the belt 27. The articles then fall by gravity from between the spindles, and slide down a curvedplate or chute 73 to the rear side of the machine.

`The rollers 67 run upon the vertical portion corn, or other fiber, or they may be pads of soft material, and any devices which will support the abrasive material in contact with the irregular surface of the work. These brushes are mounted pivotally by shafts or rods 77, which are carried by curved su vporting standards `78. These standards 8y are pivoted on a shaft 79 at the rear of. the

frame 2, and are' normally secured in a raised position by lany approved vfastening or clamping devices, 85. The standards may be slid longitudinally on the shaft 79 to adjust thein to articles of different length,

The spindles 25 y sandpaper and then polished by the finer sandpaper. The brushes are pressed toward the work by means of springs 80 secured to arms 81 at one end and to one of the standards at the other end, and the said arms 8O are secured on the shafts or rods 77.

The articles are placed in the magazine,

and are fed one by one automatically onto the centering supports which are stationary. The articles are taken from the stationary f centering supports by the spindles of the work carriers, and are carried around by them andare pressed against the abrasive material on the brushes. `The articles are revolved rapidly by the belt 27 before they touchthe abrasive material 75, and they are kept in rapid revolution by the .said belt until after they leave the abrasive material of the last brush ofthe series. The articles then cease revolving and drop from between the' carrier spindles in a finished condition when the deadjspindles 'are retracted..

`What I claim is: i

l. In a sandpapering machine, the combination, with revoluble carriers provided with spindles arranged in a circle and adapted to \support the work, of supports for abrasive material arranged in the,path of the work, automatically disengageable driving mechanism adapted to revolve the work on its own axis during one portion of each revolution of the carriers and while in contact with the abrasive material and then permitting it to stop revolving, and means for releasing the work from the spindles during the remaining portion of eachf revolution ofthe carriers after it has been moved out of contact with the abrasive material and has ceased to revolve. j Q. In a sandpapering machine, the combination, with-revoluble carriers provided with spindles arranged in a circle and adapted to support the work, ,of abrasive devices arranged in the path of the work, driving mechanism operating to revolve the spindles on their own axes while the work is in contact with the abrasive devices 'and then permitting them to stop revolving, and means for releasing-the work from the said spindles while they are not being revolved on their own axes by the said driving mechanism.

3. In a sandpapering machine, the combination, with revoluble carriers provided with spindles arranged in a circle and adapted to support the work, and belt pulleys secured to the spindles of one of the carriers; of supports for abrasive material arranged in the Vpath of the work, a driving pulley, a belt passing aroundall the .said pulleys and operating to revolve the work on its own axis, and means for holding the said belt out of engagement with certain of the pulleys during a portion/ of the revolution of the carriers.

4. In a sandpapering machine, the comblnatlon, with revoluble carriers provided w1th spindles arranged in a circle and adapted to supportthe work, and belt pulleys secured on the spindles of `one of the carriers; of supports for abrasive material arranged in the path of the work, centering supports for holding the work in a positionto be engaged by the said spindles, a driving pulley, a belt passing around all the said pulleys and operating to revolve the work on its own axis, and means for holding the said belt out of engagement with certain of the pulleys during a portion of the revolution of the carriers, to permit the work to be engaged by and discharged from the said spindles when it is not being revolved an its own axis and` is not in contact with the'abrasive material. 5. In a sandpapering machine, the combination, with revoluble carriers provided with 1 spindles arranged ina circle and adapted to support the work, of stationary brackets, vertically and .pivotally adjustable centering supports for holding the work in a position to be engagedv by the said spindles, and means for securing the centering supports to and pivoting them against one side of the upper end portions of the said brackets.

v6. In a sandpapering machine, the combination, with revoluble carriers provided 'with spindles arranged in a circle and adapted to support the work, of a stationary supportingv frame, brackets adjustable longitudinally of the frame and provided with means for securing them to itL vertically and pivotally adjustable centering supports for holding the work in a position to be engaged by the said spindles, and means for securing the centering; supports to and pivoting them against one side of the upper end portlons of the said brackets.

7 In a sandpapering machine, the combination, with revoluble carriers provided with spindles .arranged in a circle and adapted to support'the work, of a stationary supporting frame, brackets adjustable longitudinally of the frame and provided with means -r they can be adjusted separately or simultaholding the work in a position to be engaged by the said spindles, and means for securing neously, adjustable centering supports for *the centering supports to the upper end portions of said brackets.

8. In a sandpapering machine, the combination, with revoluble carriers provided With spindles arranged in a circle and adapted to support the Work, and stationary centering supports for holding the Work in a position to be engaged by the. said spindles; of a magazine for holding the pieces of Work, feedingdevices permitt-itng the pieces to drop one by one from the magazine onto the centering supports, and trip mechanism operating the feeding devices automatically so that the pieces of Work are fed at regular intervalsand in proportion to the speed of the carriers.

9. In a sandpapering machine, the combination, With revoluble carriers provided with spindles arranged in a circle and adapted to support the Work, and stationary centering supports for holding the Work in position to be engaged by the said spindles; of a magazine for holding the pieces of Work,- feeding devices permitting the pieces to drop one by one from the magazine onto the centering supports, trip pins projecting from one of the carriers and arranged to correspond with its spindles, and a trip arm op,

`erated by the said trip pins and connected to `the feeding devices so that the pieces of Work are fed automatically at regular intervals and in proportion to the speed of the carriers. A

10. In a sandpapering machine, the combination, with revolubl'e carriers provided with spindles arranged in a circle and adapted to support the Work, and stationary centering supports for holding the Work 1n position to be engaged by the said spindles; of a magazine for holding the pieces of Work, feeding devices permitting the pieces to drop one by one from the magazine onto the centering supports, said feeding devices being provided with reciprocating fingers and having adjustable guides for holding the feed fingers at various distances apart to suit pieces of work of different size, and trip mechanism operating the feeding devices automatically so that the pieces of Work are fed at regular intervals and in proportion to the speed of the carriers.

1l. In a sandpaper-ing machine, the combination, with revoluble carriers provided with spindles arranged in a circle and adapted to support the work, of standards secured at the rear of the carriers, rods having their end portions mounted to oscillate in the standards, a series of supports for abrasive material. secured to each ofthe said rods and arranged in the path of the Work, arms secured to the said rods, and springs connected to the said arms and operating to move the rods and press the said supports toward the Work.

l2. In a sandpapering machine, the combination, with a supportlng frame, and revoluble carriers mounted thereon and provided with spindles arranged in a circle and adapted to support the Work; of standards having their lower ends pivoted to the frame and provided with means for holding them in a raised position, and yielding supports for abrasive material mounted to oscillate in the said standards and provided with means for pressing them toward the Work.

In testimony whereof I have vagied myl signature in the presence of'two i sses.

ALTON MATTESON.

' Witnesses:

L. W. DRAKE, G. R. WrLsoN. 

